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WO2018142861A1 - Système de traitement de communication, procédé de traitement de communication, dispositif de traitement de communication, terminal de communication, et procédés de commande et programmes de commande pour lesdits dispositif et terminal - Google Patents

Système de traitement de communication, procédé de traitement de communication, dispositif de traitement de communication, terminal de communication, et procédés de commande et programmes de commande pour lesdits dispositif et terminal Download PDF

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Publication number
WO2018142861A1
WO2018142861A1 PCT/JP2018/000359 JP2018000359W WO2018142861A1 WO 2018142861 A1 WO2018142861 A1 WO 2018142861A1 JP 2018000359 W JP2018000359 W JP 2018000359W WO 2018142861 A1 WO2018142861 A1 WO 2018142861A1
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Prior art keywords
signal strength
received signal
threshold
communication terminal
measurement
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PCT/JP2018/000359
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English (en)
Japanese (ja)
Inventor
晃 亀井
祐美子 奥山
山田　徹
恭二 平田
芹沢　昌宏
政志 下間
長谷川　聡
Original Assignee
日本電気株式会社
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Application filed by 日本電気株式会社 filed Critical 日本電気株式会社
Priority to JP2018566009A priority Critical patent/JP6852740B2/ja
Priority to US16/483,297 priority patent/US11006368B2/en
Publication of WO2018142861A1 publication Critical patent/WO2018142861A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0245—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal according to signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/246—Connectivity information discovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/23—Manipulation of direct-mode connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
    • H04W28/0236—Traffic management, e.g. flow control or congestion control based on communication conditions radio quality, e.g. interference, losses or delay
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to a communication processing system, a communication processing method, a communication processing device, a communication terminal, and a control method and control program thereof.
  • Non-Patent Documents 1 and 2 disclose the method.
  • ProSe UE-to-Network Relay for Public Safety of Non-Patent Document 1
  • the architecture model and Figure 5.5.4.4.1- of “5.4.4 Direct communication via ProSe UE-to-Network Relay” are described. 1 describes a procedure for establishing a ProSe (D2D) connection via UE-to-Network Relay.
  • the remote UE continues measuring the signal strength of the discovery message sent from the relay UE for reselection of the relay UE even after connection using the relay UE. (See Non-Patent Document 1, page 102, lines 14 to 21).
  • Non-Patent Document 2 “23.10.4 Side Link Communication Via ProSe UE-to-Network Relay” states that “the remote UE selects the relay UE with the best PC5 link quality and the signal strength of the PC5 link. There is a description of “re-selecting the relay UE when the threshold value is lower than a preset threshold” (see Non-Patent Document 2, page 283, lines 1 to 8).
  • Patent Document 1 discloses a technique for transmitting measured communication quality from a communication terminal to a relay device. Further, in Patent Document 2, a signal quality measurement value received from a base station in a communication terminal is compared with a first threshold value to determine whether the signal quality is good or not, and compared with a second threshold value lower than the first threshold value. A technique for determining whether to “supplement narrowly” or “completely supplement” is disclosed. Patent Document 3 starts a technique in which a communication terminal measures the received signal strength from a base station, compares it with a plurality of threshold values, and sets different measurement interval factors.
  • the remote UE in preparation for relay UE reselection, the remote UE sends a discovery announcement message (UE-to-Network Discovery Announcement ⁇ ⁇ message) sent from the relay UE at a certain interval,
  • the received signal strength of the discovery response message (UE-to-Network Relay Discovery Message Response) sent from the relay UE in response to the UE request must be measured. Therefore, the power consumption of the remote UE increases. This is especially true for IoT (Internet of Things) / MTC (Machine Type Communication) / M2M (Machine to Machine) devices that operate on batteries and must be guaranteed for several to 10 years.
  • IoT Internet of Things
  • MTC Machine Type Communication
  • M2M Machine to Machine
  • An object of the present invention is to provide a technique for solving the above-described problems.
  • a communication processing system provides: A communication terminal; A base station, A relay station that relays communication between the communication terminal and the base station; In the communication terminal, measuring means for measuring the received signal strength from the relay station, Re-selecting the relay station if the measured received signal strength is less than a first threshold and comparing the measured received signal strength with a second threshold greater than the first threshold Control means for controlling to reduce the number of times of measurement of the received signal strength by the measuring means when the received signal strength is greater than the second threshold; Is provided.
  • a communication processing method includes: A communication processing method of a communication processing system comprising a communication terminal, a base station, and a relay station that relays communication between the communication terminal and the base station, In the communication terminal, a measurement step of measuring the received signal strength from the relay station; Re-selecting the relay station if the measured received signal strength is less than a first threshold and comparing the measured received signal strength with a second threshold greater than the first threshold A control step for controlling to reduce the number of times the received signal strength is measured in the measuring step when the received signal strength is greater than the second threshold; including.
  • a communication terminal provides: Measuring means for measuring the received signal strength from the relay station that relays communication between the communication terminal and the base station; Re-selecting the relay station if the measured received signal strength is less than a first threshold and comparing the measured received signal strength with a second threshold greater than the first threshold Control means for controlling to reduce the number of times of measurement of the received signal strength by the measuring means when the received signal strength is greater than the second threshold; Is provided.
  • a communication terminal control method includes: A measurement step of measuring the received signal strength from a relay station that relays communication between the communication terminal and the base station; Re-selecting the relay station if the measured received signal strength is less than a first threshold and comparing the measured received signal strength with a second threshold greater than the first threshold; A control step for controlling to reduce the number of times the received signal strength is measured in the measuring step when the received signal strength is greater than the second threshold; including.
  • a communication terminal control program provides: A measurement step of measuring the received signal strength from a relay station that relays communication between the communication terminal and the base station; Re-selecting the relay station if the measured received signal strength is less than a first threshold and comparing the measured received signal strength with a second threshold greater than the first threshold; A control step for controlling to reduce the number of times the received signal strength is measured in the measuring step when the received signal strength is greater than the second threshold; Is executed on the computer.
  • a communication processing apparatus provides: A timing setting means for setting a timing at which a communication terminal measures received signal strength from a relay station that relays communication between the communication terminal and a communication processing device to the communication terminal and the relay station; A first threshold for determining whether or not to reselect the relay station as compared with a received signal strength measured by the communication terminal, and a second threshold greater than the first threshold, the communication terminal Threshold setting means for setting the second threshold for controlling to reduce the number of times of measurement of the received signal strength when the measured received signal strength is greater than the second threshold; Updating means for updating at least the setting of the second threshold based on a history of received signal strength measured by the communication terminal; Is provided.
  • a method for controlling a communication processing apparatus includes: A timing setting step in which the communication terminal sets the timing for measuring the received signal strength from the relay station that relays communication between the communication terminal and the communication processing device in the communication terminal and the relay station; A first threshold for determining whether or not to reselect the relay station as compared with a received signal strength measured by the communication terminal, and a second threshold greater than the first threshold, the communication terminal A threshold setting step for setting, in the communication terminal, the second threshold for controlling to reduce the number of times of measurement of the received signal strength when the received signal strength measured by is greater than the second threshold; An update step of updating at least the setting of the second threshold based on a history of received signal strength measured by the communication terminal; including.
  • a control program for a communication processing apparatus includes: A timing setting step in which the communication terminal sets the timing for measuring the received signal strength from the relay station that relays communication between the communication terminal and the communication processing device in the communication terminal and the relay station; A first threshold for determining whether or not to reselect the relay station as compared with a received signal strength measured by the communication terminal, and a second threshold greater than the first threshold, the communication terminal A threshold setting step for setting, in the communication terminal, the second threshold for controlling to reduce the number of times of measurement of the received signal strength when the received signal strength measured by is greater than the second threshold; An update step of updating at least the setting of the second threshold based on a history of received signal strength measured by the communication terminal; Is executed on the computer.
  • the present invention it is possible to reduce the power consumption of the remote UE related to the measurement of the received signal strength.
  • a communication processing system 100 as a first embodiment of the present invention will be described with reference to FIG. 1A.
  • the communication processing system 100 is a system having a relay station.
  • the communication processing system 100 includes a communication terminal 101, a base station 102, a relay station 103, a measurement unit 111, and a control unit 112.
  • the relay station 103 relays communication between the communication terminal 101 and the base station 102.
  • Measurement unit 111 measures the received signal strength from relay station 103 in communication terminal 101.
  • the control unit 112 performs reselection of the relay station 103 when the measured received signal strength is smaller than the first threshold, and compares the measured received signal strength with the second threshold greater than the first threshold. When the received signal strength is greater than the second threshold, control is performed so as to decrease the number of times of measurement of the received signal strength by the measurement unit 111.
  • the reduction in the number of times of measurement of the received signal strength includes control for reducing the number of measurements (measurement frequency) within a certain period.
  • the operation of the communication terminal 101 in the communication processing system 100 as the first embodiment of the present invention will be described with reference to FIG. 1B.
  • the operation of the communication terminal 101 in FIG. 1B indicates the measurement timing of the received signal strength from the relay station 103 of the communication terminal 101.
  • the first threshold value is a threshold value for reselecting a relay station to be connected.
  • the second threshold is a threshold for reducing the number of measurements by stopping the measurement of the received signal strength in the next period when the received signal strength from the relay station is larger than the second threshold. Then, when the received signal strength from the relay station becomes smaller than the second threshold value, the reception signal strength measurement is stopped and restarted.
  • the number of reception signal strength measurements can be reduced while maintaining communication reliability, and the power consumption of a remote UE related to reception signal strength measurement can be reduced.
  • a communication processing system according to the second embodiment of the present invention will be described.
  • a third threshold value that is smaller than the second threshold value, which is a criterion for skipping measurement of received signal strength by the communication terminal, is provided, and between the second threshold value and the third threshold value. Then, whether or not to skip the measurement is maintained.
  • the power consumption of the communication terminal can be reduced more stably than switching whether or not to skip above and below the second threshold.
  • FIG. 2 is a diagram illustrating an operation of the communication terminal (remote UE) according to the present embodiment.
  • the horizontal axis represents time
  • the vertical axis represents received signal strength (dB).
  • the received signal strength is compared with the second threshold and the third threshold, and the number of times the received signal strength is measured is reduced. To do.
  • the first threshold value is a threshold value for reselecting a relay station to be connected.
  • the measured received signal strength from the connected relay station becomes smaller than the first threshold, it is determined that the communication state with the connected relay station has deteriorated, and the relay station connected more stably is reselected. To do.
  • FIG. 2 does not illustrate the reselection process.
  • the second threshold value is a threshold value for stopping the reception signal strength measurement in the next period and reducing the number of measurements when the received signal strength from the relay station is larger than the second threshold value.
  • the third threshold is a threshold for stopping and restarting the measurement of the received signal strength when the received signal strength from the relay station becomes smaller than the third threshold.
  • the measurement (between the second threshold and the third threshold: the next measurement is not stopped), the measurement (greater than the second threshold: the next measurement is stopped), and the stop are sequentially performed from the left in FIG. , Measurement (greater than the second threshold: stop next measurement), stop, measurement (between the second threshold and third threshold: maintain the next measurement stop), stop, measurement (second threshold and third threshold Between: maintenance of the next measurement stop), stop, measurement (less than the third threshold value: without stopping the next measurement), measurement (greater than the second threshold value: stop the next measurement), stop, and so on.
  • 5 times out of 12 received signal strength measurement periods can be canceled because the measurement strength is stable and large, and the power consumption of the remote UE is reduced.
  • FIG. 3A is a block diagram showing a standard configuration of a communication processing system 300 as a prerequisite technology.
  • FIG. 3A is an architecture model of the communication processing system 300 illustrated in FIG. 4.4.3-1 of “4.4.3 ProSe UE-to-Network Relay for ⁇ Public Safety” of Non-Patent Document 1.
  • FIG. 3B is a sequence diagram showing a standard operation of the communication processing system 300 as a prerequisite technology. 3B shows the ProSe (D2D) connection via UE-to-Network Relay shown in Figure 5.4.4.1-1 of “5.4.4 Direct Communication via ProSe UE-to-Network Relay” of Non-Patent Document 1. It is a procedure to establish.
  • the UE-to-Network Relay node attaches to E-UTRAN and establishes a PDN connection.
  • the remote UE searches for a UE-to-Network Relay node using a Model-A or Model-B discovery procedure.
  • the remote UE selects a UE-to-Network Relay node and establishes a connection.
  • the UE-to-Network Relay node sets the IP address of the remote UE.
  • Five. UE-to-Network Relay node reports remote UE ID and IP information to MME. 6.
  • MME reports remote User ID and IP information to S-GW and P-GW. 7.
  • Relay traffic is transmitted and received between the remote UE and the P-GW.
  • Non-Patent Document 2 “23.10.4 Side Link Communication Via ProSe UE-to-Network Relay” states that “the remote UE selects the relay UE with the best PC5 link quality and the signal strength of the PC5 link. There is a description of “re-selecting the relay UE when the threshold value is lower than a preset threshold”.
  • the remote UE in preparation for reselection of the relay UE, the remote UE must measure the received signal strength of the discovery announcement message sent from the relay UE at a certain interval, and the power consumption of the remote UE There is a problem that increases. This is especially true for IoT / MTC / M2M devices that operate on batteries and must be guaranteed for several to 10 years.
  • the present embodiment skips the next measurement when the received signal strength exceeds a second threshold value that is higher than the first threshold value set for relay UE reselection.
  • the measurement is performed in the intermittent measurement mode in which measurement is performed at the next measurement opportunity without performing measurement.
  • a third threshold value that is higher than the first threshold value but lower than the second threshold value is set, and if it falls below the third threshold value, measurement skipping is not performed, and operation is performed in a continuous measurement mode in which measurement is performed continuously. Therefore, it is intended to save power in IoT devices while maintaining communication reliability.
  • FIG. 4 is a sequence diagram showing an operation of the communication processing system 400 according to the present embodiment.
  • FIG. 4 shows components and sequences related to the reduction of the number of times of measurement of received signal strength in the communication terminal 410 of the present embodiment.
  • step S410 base station 420 sets the frequency of the transmission signal used for measuring the received signal strength and the transmission / reception cycle of the transmission signal for communication terminal 410 and relay station 430, and performs timing setting. . Furthermore, a first threshold value that is a criterion for reselection of relay station 430 is set for communication terminal 410.
  • step S300 the base station 420 selects the relay station 430 connected to the communication terminal 410 based on the measurement of the received signal strength, and the communication terminal 410, the base station 420, Is relayed and connected to the selected relay station 430.
  • step S420 the base station 420 acquires the second threshold value and the third threshold value of the present embodiment, and transmits them to the communication terminal 410.
  • step S430 the communication terminal 410 holds the transmitted second threshold value and third threshold value for use in reducing the number of received signal strength measurements, and sets the threshold value.
  • step S440 the communication terminal 410 uses the second threshold value and the third threshold value to reduce the number of signal strength measurements transmitted from the relay station 430 according to the transmission / reception cycle of the transmission signal. Reduce the power consumption of remote UEs related to intensity measurement.
  • a case of “Model A” in which a discovery announcement message (Discovery Announcement Message) is periodically transmitted from the relay station 430 will be described.
  • a discovery response message "Model B” requesting Discovery (Response (Message) may be used.
  • FIG. 5 is a block diagram illustrating a functional configuration of the communication processing device 420 (base station: eNB) according to the present embodiment.
  • FIG. 5 shows functional components related to the present embodiment, and illustration of other functions of the communication processing device 420 is omitted.
  • the communication processing device 420 includes a communication control unit 501, a base station database 502, a communication history acquisition unit 503, a communication path setting unit 504, a received signal measurement parameter setting unit 505, a communication terminal location registration unit 506, Is provided.
  • the communication control unit 501 controls communication between the communication processing device 420 and a higher-level device such as the relay station 430 or the MME. Although not shown in FIG. 5, communication between the communication processing device 420 and the communication terminal 410 may be controlled. In FIG. 5, one communication control unit 501 is described so as to control communication with both the lower-level device and the higher-level device. However, a lower-level device communication control unit and a higher-level device communication control unit are separately provided. Also good.
  • the base station database 502 stores data necessary for the operation of the communication processing device 420 as a base station.
  • the communication history acquisition unit 503 acquires the communication history of the communication terminal 410 and the relay station 430 including the measurement result of the received signal strength measured by each communication terminal 410 and stores it in the base station database 502.
  • the communication path setting unit 504 instructs to select and set the relay station 430 connected to the communication terminal 410 from the communication history information including the measurement result of the received signal strength stored in the base station database 502.
  • Received signal measurement parameter setting section 505 refers to base station database 502 and sets received signal measurement parameters in communication terminal 410 or relay station 430.
  • the communication terminal location registration unit 506 receives the location of the communication terminal 410 located in the cell of this base station, and registers the location with a higher-level device such as an MME.
  • FIG. 6 is a diagram showing a configuration of the base station database 502 according to the present embodiment.
  • the base station database 502 stores data necessary for the operation of the communication processing device 420 of the present embodiment.
  • the base station database 502 is used for the history storage unit 610 for storing information histories of the communication terminal 410 and the relay station 430 in the cell controlled by the communication processing device 420, and for the communication terminal 410 and the relay station 430 in the cell. And a parameter storage unit 620 for storing parameters for realizing the above control.
  • the history storage unit 610 includes a communication terminal position 612 associated with a communication terminal ID 611 located in the cell, a received signal strength history 613 measured by the communication terminal 410, and a relay station ID 614 currently entrusted and connected. , Remember.
  • the parameter storage unit 620 includes a discovery processing parameter 621 necessary for discovery processing, a received signal strength determination parameter 622 for determining the received signal strength and reducing the number of measurements of the present embodiment, a measurement skip pattern 623,
  • the discovery processing parameter 621 includes a signal frequency and a discovery period.
  • the received signal strength determination parameter 622 includes a first threshold value, a second threshold value, and a third threshold value. Further, as the skip pattern 623, in the present embodiment, a pattern for skipping the next one time is stored.
  • FIG. 7 is a block diagram illustrating a functional configuration of the relay station 430 (relay UE) according to the present embodiment.
  • FIG. 7 shows functional components related to this embodiment, and illustration of other functions of the relay station 430 is omitted.
  • the relay station 430 includes a communication control unit 701, a relay station database 702, a relay processing parameter acquisition unit 703, a communication relay processing unit 704, and a discovery processing control unit 705.
  • the communication control unit 701 controls communication between the relay station 430 and the base station 420 or the communication terminal 410. Although not shown in FIG. 7, communication with another relay station 430 may be controlled. In FIG. 7, one communication control unit 701 is described so as to control communication with both the base station 420 and the communication terminal 410, but the base station communication control unit and the communication terminal communication control unit are separately provided. , May be provided.
  • the relay station database 702 has a discovery processing parameter 721 and stores data necessary for the operation of the relay station 430.
  • the relay processing parameter acquisition unit 703 acquires parameters necessary for the relay processing set from the base station 420 and stores them in the relay station database 702.
  • the communication relay processing unit 704 relays communication between the base station 420 and the communication terminal 410 using the relay processing parameters stored in the relay station database 702.
  • the discovery process control unit 705 controls the discovery process for the communication terminal 410 to be connected using the parameters stored in the discovery process parameter 721 of the relay station database 702.
  • FIG. 8 is a block diagram illustrating a functional configuration of the communication terminal 410 (remote UE) according to the present embodiment. Note that FIG. 8 shows functional components related to the present embodiment, and illustration of other functions of the communication terminal 410 is omitted.
  • the communication terminal 410 includes a communication control unit 801, a communication terminal database 802, a communication processing parameter acquisition unit 803, a communication processing unit 804, a received signal strength measurement processing unit 805, and a power source (battery) 806.
  • the communication control unit 801 controls communication between the communication terminal 410 and the relay station 430. Although not described in FIG. 8, communication with the base station 420 or another communication terminal 410 may be controlled.
  • the communication terminal database 802 stores data necessary for the operation of the communication terminal 410.
  • the communication processing parameter acquisition unit 803 acquires parameters necessary for communication processing set from the base station 420 and stores them in the communication terminal database 802.
  • the communication processing unit 804 processes communication with the base station 420 that relays the relay station 430 using the communication processing parameters stored in the communication terminal database 802.
  • Communication processing section 804 also performs relay station reselection processing based on the measurement result of the received signal strength.
  • the received signal strength measurement processing unit 805 uses the parameters stored in the communication terminal database 802 to perform processing so as to reduce the number of received signal strength measurements transmitted from the relay station 430.
  • a power source (battery) 806 is a power source for the communication terminal 410.
  • FIG. 9 is a diagram showing a configuration of the communication terminal database 802 according to the present embodiment.
  • the communication terminal database 802 stores data necessary for the operation of the communication terminal 410.
  • the communication terminal database 802 includes a parameter storage unit 910 that stores parameters for realizing the control of the present embodiment for the communication terminal 410, the relay station 430 to which the communication terminal 410 is currently connected, the received signal strength history, And a relay station information storage unit 920 for storing.
  • the parameter storage unit 910 includes a discovery processing parameter 911 necessary for discovery processing, a received signal strength determination parameter 912 for determining the received signal strength and reducing the number of times of measurement according to the present embodiment, a measurement skip pattern 913,
  • the discovery processing parameter 911 includes a signal frequency and a discovery period.
  • the received signal strength determination parameter 912 includes a first threshold value, a second threshold value, and a third threshold value. Further, as the skip pattern 913, in the present embodiment, a pattern for skipping the next one time is stored.
  • the relay station information storage unit 920 stores the connection relay station ID 921 and the received signal strength history 922 measured by the communication terminal 410.
  • FIG. 10A is a block diagram showing a functional configuration of the received signal strength measurement processing unit 805 according to the present embodiment.
  • the received signal strength measurement processing unit 805 includes a received signal strength measuring unit 1001, a received signal frequency / measurement period acquiring unit 1002, a threshold acquiring unit 1003, a second threshold comparing unit 1004, a third threshold comparing unit 1005, A reception signal strength measurement start / stop control unit 1006.
  • the received signal strength measurement unit 1001 measures the strength of the received signal transmitted at a predetermined frequency from the relay station 430 at a predetermined period.
  • the reception signal frequency / measurement period acquisition unit 1002 acquires the frequency and measurement period of the reception signal stored in the communication terminal database 802 and provides the reception signal strength measurement unit 1001 with the frequency and measurement period.
  • the threshold acquisition unit 1003 acquires the second threshold and the third threshold stored in the communication terminal database 802.
  • the second threshold comparing unit 1004 compares the received signal strength measured by the received signal strength measuring unit 1001 with the second threshold.
  • the third threshold value comparison unit 1005 compares the received signal strength measured by the received signal strength measurement unit 1001 with the third threshold value.
  • the reception signal strength measurement start / stop control unit 1006 has a start / stop control table 1006a, and when the received signal strength from the communication processing unit 804 is a comparison result larger than the first threshold, the second threshold value comparison unit 1004 Based on the comparison result and the comparison result of the third threshold value comparison unit 1005, it is controlled whether to start or stop the measurement of the next received signal strength.
  • the reception signal strength measurement start / stop control unit 1006 stops measuring the next reception signal strength, power is not supplied to the elements constituting the reception signal strength measurement processing unit 805, and the power is not supplied from the relay station 430. I will ignore the signal. By turning off the power related to the received signal strength measurement, the power consumption can be greatly reduced.
  • FIG. 10B is a diagram showing a configuration of the start / stop control table 1006a according to the present embodiment.
  • the start / stop control table 1006a is used to control the start / stop of reception signal strength measurement in the reception signal strength measurement start / stop control unit 1006.
  • “H” indicates that the received signal strength is greater than the threshold
  • “L” indicates that the received signal strength is less than the threshold.
  • the start / stop control table 1006a stores the measurement start / stop 1064 at the reception signal strength measurement period in association with the combination of the first threshold comparison result 1061, the second threshold comparison result 1062, and the third threshold comparison result 1063. To do.
  • the measurement is stopped because the relay station 430 is reselected regardless of the comparison result between the second threshold value and the third threshold value. If the received signal strength is larger than the second threshold, the next measurement is stopped, if it is between the second threshold and the third threshold, the previous determination result is maintained, and if it is smaller than the third threshold Start the next measurement.
  • FIG. 11 is a block diagram illustrating a hardware configuration of the communication processing device 420 (base station: eNB) according to the present embodiment.
  • a CPU (Central Processing Unit) 1110 is a processor for arithmetic control, and implements the functional configuration unit of FIG. 5 by executing a program.
  • the CPU 1110 may include a plurality of processors and execute different programs, modules, tasks, threads, and the like in parallel.
  • a ROM (Read Only Memory) 1120 stores fixed data and programs such as initial data and programs.
  • the network interface 1130 controls communication with the relay station 430, the communication terminal 410, or other host devices via the network.
  • a RAM (Random Access Memory) 1140 is a random access memory that the CPU 1110 uses as a work area for temporary storage.
  • the RAM 1140 has an area for storing data necessary for realizing the present embodiment.
  • the communication terminal information 1141 is information on a communication terminal in the cell area of the communication processing device 420 as a base station.
  • Communication terminal information 1141 includes communication terminal position data, received signal strength data, connected relay station ID, and the like in association with the communication terminal ID of each communication terminal.
  • the received signal measurement parameter 1142 is a parameter used for measuring the received signal strength between the connected relay station 430 and the communication terminal 410.
  • the transmission / reception data 1143 is data transmitted / received to / from the relay station 430, the communication terminal 410, or other higher-level devices via the network interface 1130.
  • the storage 1150 stores a database, various parameters, or the following data or programs necessary for realizing the present embodiment.
  • the base station database 502 is the database shown in FIG.
  • the storage 1150 stores the following programs.
  • the base station control program 1151 is a program that controls communication processing of the entire information processing apparatus 420.
  • the communication history acquisition module 1152 is a module that acquires communication histories from the communication terminal 410 and the relay station 430 including received signal strength and accumulates them in the base station database 502.
  • the communication path setting module 1153 is a module that selects a relay station 430 to be connected with reference to the communication history of the base station database 502 and sets a communication path between the base station and the communication terminal.
  • the received signal measurement parameter setting module 1154 is a module for setting a parameter for measuring the received signal strength at a predetermined period and a parameter including a threshold value for controlling start / stop of the received signal strength measurement.
  • the communication terminal location registration module 1155 is a module for registering the location of a communication terminal located in a cell.
  • RAM 1140 and storage 1150 in FIG. 11 do not show programs and data related to general-purpose functions and other realizable functions of the communication processing apparatus 420.
  • FIG. 12 is a flowchart illustrating a processing procedure of the communication processing device 420 (base station: eNB) according to the present embodiment. This flowchart is executed by the CPU 1110 of FIG. 11 using the RAM 1140, and implements the functional configuration unit of FIG.
  • step S1201 the communication processing device 420 sets the frequency and the measurement cycle of the intensity measurement signal to the communication terminal and the relay station.
  • step S1203 the communication processing device 420 sets each threshold value (in the present embodiment, the first threshold value, the second threshold value, and the third threshold value) in the communication terminal.
  • step S1205 the communication processing device 420 receives the location information of the communication terminal and registers it in the MMC or the like.
  • step S1207 the communication processing device 420 acquires the received signal strength received from each relay station from the communication terminal, selects the relay station to be connected, and notifies the communication terminal and the selected relay station.
  • step S1209 the communication processing device 420 relays the selected relay station and executes data communication processing.
  • step S1211 If the received signal strength from the connected relay station becomes smaller than the first threshold in step S1211, and the communication terminal requests reselection of the relay station, the communication processing device 420 returns to step S1207 and relays. Re-select station. If the relay station reselection is not requested, the communication processing device 420 determines in step S1213 whether or not the communication processing is completed. If the communication processing is not finished, the communication processing device 420 returns to step S1209 and continues the data communication processing.
  • FIG. 13 is a block diagram showing a hardware configuration of the communication terminal 410 (remote UE) according to the present embodiment.
  • a CPU 1310 is a processor for arithmetic control, and implements the functional components shown in FIG. 4 by executing a program.
  • the CPU 1310 may include a plurality of processors and execute different programs, modules, tasks, threads, and the like in parallel.
  • the ROM 1320 stores fixed data and programs such as initial data and programs.
  • the network interface 1330 controls communication with the relay station 430 or the communication processing device 420 via the network.
  • the RAM 1340 is a random access memory that the CPU 1310 uses as a work area for temporary storage.
  • the RAM 1340 has an area for storing data necessary for realizing the present embodiment.
  • the frequency and measurement period 1341 are the frequency and measurement period of the intensity measurement signal from the connected relay station.
  • the received signal strength 1342 is a measurement strength result of the signal received from the relay station based on the frequency and the measurement period 1341.
  • the first threshold value 1343 is a signal strength threshold value for determining whether or not to reselect a relay station.
  • the second threshold 1344 is a signal strength threshold for determining whether or not to skip the next signal strength measurement.
  • the third threshold value 1345 is a signal strength threshold value for determining not to skip the next signal strength measurement.
  • the signal strength determination result 1346 is a comparison result using the first threshold value 1343, the second threshold value 1344, and the third threshold value 1345.
  • the signal strength measurement start / stop 1347 is a flag indicating whether to start / stop the next signal strength measurement from the signal strength determination result 1346.
  • Transmission / reception data 1348 is data transmitted / received to / from the relay station 430 and the base station 420 via the network interface 1330.
  • the input / output data 1349 is data input / output from the input / output device via the input / output interface 1360.
  • the storage 1350 stores a database, various parameters, or the following data or programs necessary for realizing the present embodiment.
  • the communication terminal database 802 stores data necessary for the operation of the communication terminal 410 as shown in FIG.
  • the storage 1350 stores the following programs.
  • the communication terminal control program 1351 is a program for controlling the entire communication terminal 410.
  • the received signal strength measurement module 1352 is a module that measures the received strength of the signal from the relay station 430.
  • the signal strength determination module 1353 is a module that compares the measured signal reception strength with a threshold value to determine the signal strength.
  • the received signal measurement count control module 1354 is a module that controls to reduce the number of received signal strength measurements based on the signal strength determination result.
  • the input / output interface 1360 interfaces input / output with peripheral devices.
  • An input device 1361 and an output device 1362 when the communication terminal 410 is used as an IoT device or the like are connected to the input / output interface 1360.
  • Other peripheral devices may be connected.
  • RAM 1340 and storage 1350 in FIG. 13 do not show programs and data related to general-purpose functions and other realizable functions of the communication terminal 410.
  • 14A and 14B are flowcharts showing a processing procedure of the communication terminal 410 (remote UE) according to this embodiment. This flowchart is executed by the CPU 1310 of FIG. 13 using the RAM 1340, and implements the functional configuration unit of FIG.
  • step S1401 the communication terminal 410 receives the frequency of the intensity measurement signal and the measurement cycle from the base station 420. In addition, the communication terminal 410 receives a threshold value from the base station 420 in step S1403. In this example, the first threshold value, the second threshold value, and the third threshold value are received. In step S1405, the communication terminal 410 acquires position information, transmits it to the base station 420, and registers the position.
  • step S1407 the communication terminal 410 waits for the received signal strength measurement timing according to the received measurement cycle.
  • the communication terminal 410 determines in step S1409 whether to start / stop signal strength measurement.
  • the communication terminal 410 executes a signal strength measurement process in step S1411.
  • the communication terminal 410 changes the stop flag to the activation flag in step S1427, and proceeds to step S1429.
  • the communication terminal 410 After executing the signal strength measurement process, the communication terminal 410 determines whether or not the measured signal strength is greater than the first threshold value in step S1413. If the signal strength is smaller than the first threshold, the communication terminal 410 reselects the relay station in step S1419 and returns to step S1401.
  • the communication terminal 410 determines whether or not the measured signal strength is greater than the second threshold in step S1415. If the signal strength is greater than the second threshold, the communication terminal 410 sets a next measurement stop flag in step S1417. When the signal strength is smaller than the second threshold, the communication terminal 410 determines whether or not the measured signal strength is larger than the third threshold in step S1421. If the signal strength is greater than the third threshold, the communication terminal 410 maintains the flag of the previous determination result in step S1423. That is, if it is skipped, skipping is repeated every other time, and if it is continuous measurement, continuous measurement is continued. When the signal strength is smaller than the third threshold, the communication terminal 410 sets a start flag for the next measurement in step S1425.
  • step S1429 the communication terminal 410 determines whether or not the communication is finished. If the communication is not finished, the communication terminal 410 returns to step S1407 and waits for the next signal strength measurement cycle.
  • the number of reception signal strength measurements can be more stably reduced while maintaining communication reliability, and the power consumption of the remote UE related to the measurement of the received signal strength can be reduced.
  • the communication processing system according to the present embodiment is not limited to a single skip of the number of times of measurement of received signal strength, but a plurality of skips when the received signal strength is stable. It differs in that it does. Since other configurations and operations are the same as those of the second embodiment, the same configurations and operations are denoted by the same reference numerals, and detailed description thereof is omitted.
  • FIG. 15 is a diagram illustrating an operation of the communication terminal (remote UE) according to the present embodiment.
  • the next two measurements are skipped.
  • the number of skips may be made to correspond to the number of consecutive cases where the received signal strength is greater than the second threshold. Note that the determination by comparison with each threshold is the same as in the second embodiment.
  • measurement between the second threshold value and the third threshold value: the next measurement is not stopped
  • measurement greater than the second threshold value: the next measurement is stopped
  • stop in order from the left in FIG.
  • Measurement greater than the second threshold: stop the next two measurements
  • stop, stop, measurement between the second threshold and the third threshold: maintain the next measurement stop
  • stop, measurement second threshold and Between the third threshold: the next measurement stop is maintained), stopped, measured (less than the third threshold: the next measurement is not stopped), measured (greater than the second threshold: the next measurement is stopped), stopped, and so on.
  • 6 times out of 12 received signal strength measurement periods can be canceled because the measurement strength is stable and large, and the power consumption of the remote UE is further reduced.
  • FIG. 16 is a diagram showing a configuration of the start / stop control table 1606a according to the present embodiment.
  • the same reference numerals are given to the same elements as those in FIG. 10B, and duplicate descriptions are omitted.
  • the start / stop control table 1606a stores measurement start / stop 1664 at the received signal strength measurement period in association with the combination of the first threshold comparison result 1061, the second threshold comparison result 1662, and the third threshold comparison result 1063. To do.
  • the next two measurements are stopped, and when it is between the second threshold and the third threshold, it is returned to once when the second stop is performed. In other cases, the previous determination result is maintained.
  • FIG. 17 is a flowchart showing a processing procedure of the communication terminal 410 (remote UE) according to the present embodiment.
  • the same steps as those in FIG. 14B are denoted by the same step numbers, and redundant description is omitted.
  • step S1716 the communication terminal 410 determines whether or not the continuous skip determination flag is set. If the continuous skip determination flag is not set, the communication terminal 410 sets the continuous skip determination flag in step S1717. On the other hand, if the determination flag for continuous skip is set, the communication terminal 410 sets the next and subsequent two consecutive measurement stop flags in step S1718.
  • the communication terminal 410 changes the continuous measurement stop flag to the next measurement stop flag in step S1723.
  • the number of measurements can be further reduced, and the power consumption of the remote UE related to the measurement of the received signal strength can be reduced.
  • the communication processing system according to the present embodiment updates the threshold for controlling the number of reception signal strength measurements in response to the stability of the received signal strength.
  • the same configurations and operations are denoted by the same reference numerals, and detailed description thereof is omitted.
  • FIG. 18 is a diagram illustrating an operation of the communication terminal (remote UE) according to the present embodiment.
  • the second threshold value and the third threshold value are updated.
  • the second threshold value and the third threshold value are changed small. Note that the determination by comparison with each threshold is the same as in the second embodiment.
  • FIG. 19A is a diagram showing a configuration of the base station database 1902 according to the present embodiment.
  • the same functional components as those in FIG. 6 are denoted by the same reference numerals, and redundant description is omitted.
  • the base station database 1902 is used for the history storage unit 610 for storing information histories of the communication terminal 410 and the relay station 430 in the cell controlled by the communication processing device 420, and for the communication terminal 410 and the relay station 430 in the cell. And a parameter storage unit 1920 for storing parameters for realizing the above control.
  • the parameter storage unit 1920 stores different second threshold values or third threshold values as the received signal strength history 1922 and the received signal strength determination parameter 1923 in association with each of the intra-cell communication terminal IDs 1921 (or group IDs).
  • FIG. 19B is a flowchart illustrating a processing procedure of the communication processing device 420 (base station: eNB) according to the present embodiment.
  • the same steps as those in FIG. 12 are denoted by the same step numbers, and redundant description is omitted.
  • step S1901 the communication processing device 420 determines whether or not the threshold needs to be updated based on the received signal strength history of the communication terminal. If the threshold needs to be updated, the communication processing device 420 proceeds from step S1903 to S1905, and transmits the updated second threshold and third threshold to the communication terminal. If it is not necessary to update the threshold value, the communication processing device 420 proceeds to step S1213 without doing anything.
  • FIG. 20 is a flowchart showing a processing procedure of the communication terminal 410 (remote UE) according to the present embodiment.
  • the same steps as those in FIG. 14A are denoted by the same step numbers, and redundant description is omitted.
  • step S2001 the communication terminal 410 determines whether or not there is a threshold update instruction. If it is a threshold update instruction, the communication terminal 410 receives and holds a new threshold in step S2003. On the other hand, if the instruction is not a threshold update instruction, the communication terminal 410 proceeds to step S1411 without doing anything.
  • the present embodiment it is possible to reduce the number of measurements that reflect the stability of the received signal strength, and to reduce the power consumption of the remote UE related to the measurement of the received signal strength.
  • the communication processing system according to the present embodiment is different from the second to fourth embodiments in that the number of reception signal strength measurements is controlled in consideration of the state of the communication terminal. Since other configurations and operations are the same as those in the second to fourth embodiments, the same configurations and operations are denoted by the same reference numerals, and detailed description thereof is omitted.
  • FIG. 21 is a diagram illustrating operations of the communication terminal (remote UE) according to the present embodiment.
  • the current state of the communication terminal is determined, and the received signal strength measurement is controlled corresponding to the state.
  • the received signal strength is unstable during the period immediately after connection with the relay station or when the communication terminal is moving, skipping signal strength measurement is suppressed.
  • the communication terminal is stationary, not during the period immediately after connection with the relay station, the received signal strength is stable, so signal strength measurement is skipped. Note that the determination by comparison with each threshold is the same as in the second embodiment.
  • FIG. 22A is a diagram showing a configuration of the base station database 2202 according to the present embodiment.
  • the same functional components as those in FIG. 6 are denoted by the same reference numerals, and redundant description is omitted.
  • the base station database 2202 is used for the history storage unit 2210 for storing information history of the communication terminal 410 and the relay station 430 in the cell controlled by the communication processing device 420, and for the communication terminal 410 and the relay station 430 in the cell.
  • a parameter storage unit 620 for storing parameters for realizing the above control, and a skip suppression table 2230 for suppressing the intensity measurement skip according to the state of the communication terminal.
  • the history storage unit 2210 stores an intensity measurement skip stop flag 2215 associated with the communication terminal ID 611 located in the cell.
  • the skip suppression table 2230 stores a strength measurement skip execution / stop flag 2215 on condition of the state 2231 of the communication terminal.
  • the state 2231 of the communication terminal includes conditions such as whether the communication terminal is stationary / moving or just after connection with the relay station, but is not limited to this example.
  • FIG. 22B is a flowchart illustrating a processing procedure of the communication terminal 410 (remote UE) according to the present embodiment.
  • the same steps as those in FIG. 14A are denoted by the same step numbers, and redundant description is omitted.
  • step S2208 the communication terminal 410 determines whether or not a strength measurement skip instruction has been issued from the communication processing device 420 (base station). If there is an instruction to cancel the intensity measurement skip, the communication terminal 410 proceeds to step S1411 and does not perform the intensity measurement skip. On the other hand, if there is no instruction to stop the intensity measurement skip, the communication terminal 410 proceeds to step S1409, and performs normal intensity measurement skip control.
  • the present embodiment it is possible to reduce the number of times of measurement reflecting the state of the communication terminal, and it is possible to reduce the power consumption of the remote UE related to the measurement of the received signal strength.
  • the communication processing system according to this embodiment is different from the second to fifth embodiments in that the number of measurements is reduced by extending the measurement cycle when the received signal strength is stable. Since other configurations and operations are the same as those in the second to fifth embodiments, the same configurations and operations are denoted by the same reference numerals, and detailed description thereof is omitted.
  • FIG. 23 is a diagram illustrating operations of the communication terminal (remote UE) according to the present embodiment.
  • the received signal strength is stable (continuously exceeds the second threshold)
  • the received signal strength measurement period itself is lengthened to reduce the number of measurements.
  • the measurement period of the received signal strength is changed to a double length. If the second threshold is not exceeded continuously, the measurement cycle is restored. Note that the determination by comparison with each threshold is the same as in the second embodiment.
  • measurement between the second threshold value and the third threshold value: the next measurement is not stopped
  • measurement greater than the second threshold value: the next measurement is stopped
  • stop in order from the left in FIG.
  • Measurement greater than second threshold: cancel next measurement + double measurement cycle
  • stop measurement
  • measurement between second threshold and third threshold: maintain next measurement stop + return measurement cycle
  • cancel Measurement (smaller than the third threshold: the next measurement is not stopped)
  • measurement greater than the second threshold: the next measurement is stopped
  • stop and so on.
  • six out of twelve received signal strength measurement cycles in the initial measurement cycle can be canceled because the measurement strength is stable, and processing related to measurement cycle control is also performed. Therefore, the power consumption of the remote UE is further reduced.
  • FIG. 24A is a diagram showing a configuration of the base station database 2402 according to the present embodiment.
  • the same functional components as those in FIG. 6 are denoted by the same reference numerals, and redundant description is omitted.
  • the base station database 2402 is used for the history storage unit 610 for storing the communication history of the communication terminal 410 and the relay station 430 in the cell controlled by the communication processing device 420, and for the communication terminal 410 and the relay station 430 in the cell.
  • the parameter storage unit 2420 stores a connection relay station ID 2422 and a discovery processing parameter 2423 in association with the communication terminal ID (or group ID) 2421 existing in the cell.
  • the discovery parameter change table 2430 stores a discovery processing parameter 2432 in association with the received signal strength measurement history 2431.
  • a discovery processing parameter 2432 corresponding to the received signal strength measurement history 2431 is set in the discovery processing parameter 2423.
  • FIG. 24B is a flowchart illustrating a processing procedure of the communication processing device 420 (base station: eNB) according to the present embodiment.
  • the same steps as those in FIG. 12 are denoted by the same step numbers, and redundant description is omitted.
  • step S2401 the communication processing device 420 determines whether or not the measurement cycle needs to be updated based on the received signal strength history of the communication terminal. If it is necessary to update the measurement cycle, the communication processing apparatus 420 proceeds from step S2403 to S2405, and transmits the measurement cycle to be updated to the communication terminal. If there is no need to update the measurement cycle, the communication processing device 420 proceeds to step S1213 without doing anything.
  • the communication processing system according to the present embodiment is different from the second to sixth embodiments in that control for reducing the number of times of reception signal strength measurement is performed not by the base station but by each communication terminal. Since other configurations and operations are the same as those in the second to sixth embodiments, the same configurations and operations are denoted by the same reference numerals, and detailed description thereof is omitted.
  • FIG. 25 is a sequence diagram showing an operation of the communication processing system 2500 according to the present embodiment.
  • steps similar to those in FIG. 4 are denoted by the same step numbers, and redundant description is omitted.
  • step S 2540 the communication terminal 2510 updates the threshold update, the measurement cycle update, and the intensity measurement skip algorithm based on the measured received signal strength history while continuing the discovery process. And if necessary, it notifies a relay station or a base station.
  • FIG. 26A is a block diagram showing a functional configuration of a communication terminal 2510 (remote UE) according to the present embodiment.
  • the same functional components as those in FIG. 8 are denoted by the same reference numerals, and redundant description is omitted.
  • the communication terminal 2510 includes a communication terminal database 2602, a communication history storage unit 2607, and a communication processing parameter update unit 2608.
  • the communication terminal database 2602 stores data for updating a threshold update, a measurement cycle update, and an intensity measurement skip algorithm.
  • the communication history storage unit 2607 acquires a communication history including the measured received signal strength history and stores it in the communication terminal database 2602.
  • the communication processing parameter update unit 2608 refers to the communication history including the history of received signal strength accumulated in the communication terminal database 2602 and updates the communication processing parameter.
  • FIG. 26B is a flowchart showing a processing procedure of the communication terminal 2510 (remote UE) according to the present embodiment.
  • the same step number is attached to the same step as in FIG. 14A, and a duplicate description is omitted.
  • step S2601 the communication terminal 2510 determines whether or not the strength measurement parameter needs to be updated. If the strength measurement parameter needs to be updated, the communication terminal 2510 updates the strength measurement parameter in step S2603, returns to step S1407, and waits for the next measurement cycle. On the other hand, if it is not necessary to update the intensity measurement parameter, the communication terminal 2510 returns to step S1407 and waits for the next measurement cycle without updating the intensity measurement parameter.
  • the number of measurements can be uniquely reduced by the communication terminal, and the power consumption of the remote UE related to the measurement of the received signal strength can be reduced.
  • the present invention may be applied to a system composed of a plurality of devices, or may be applied to a single device. Furthermore, the present invention can also be applied to a case where an information processing program that implements the functions of the embodiments is supplied directly or remotely to a system or apparatus. Therefore, in order to realize the functions of the present invention on a computer, a program installed on the computer, a medium storing the program, and a WWW (World Wide Web) server that downloads the program are also included in the scope of the present invention. . In particular, at least a non-transitory computer readable medium storing a program for causing a computer to execute the processing steps included in the above-described embodiments is included in the scope of the present invention.
  • Appendix 1 A communication terminal; A base station, A relay station that relays communication between the communication terminal and the base station; In the communication terminal, measuring means for measuring the received signal strength from the relay station, Re-selecting the relay station if the measured received signal strength is less than a first threshold and comparing the measured received signal strength with a second threshold greater than the first threshold Control means for controlling to reduce the number of times of measurement of the received signal strength by the measuring means when the received signal strength is greater than the second threshold;
  • a communication processing system comprising: (Appendix 2) The communication processing system according to appendix 1, wherein the control means controls to skip at least one subsequent measurement of received signal strength when the measured received signal strength is greater than the second threshold.
  • the communication processing system according to any one of appendices 1 to 4, wherein a decrease in the number of times of measurement of the received signal strength by the measuring unit is stopped.
  • Appendix 6 The communication processing system according to supplementary note 5, wherein the control means includes second setting means for setting the third threshold value based on the measurement history of the received signal strength.
  • Appendix 7) The communication processing system according to any one of appendices 1 to 6, wherein the control unit further controls the number of times of measurement of the received signal strength by the measurement unit in consideration of a current state of the communication terminal. .
  • the communication processing system according to appendix 7, wherein the current state of the communication terminal includes whether the communication terminal is stationary or moving, or whether the connection between the communication terminal and the relay station is in an initial stage. .
  • the communication processing system according to any one of appendices 1 to 8, wherein the control unit includes a third setting unit that sets a measurement timing of the measurement unit based on a measurement history of the received signal strength.
  • the communication terminal is a Remote UE (Remote UE) in 3GPP TS 23.303 V14.1.0, the base station is an eNB, the relay station is a ProSe UE-to-NW Relay (Relay UE), and the measurement means 10.
  • the communication processing system according to any one of appendices 1 to 9, wherein the measurement of the received signal strength is included in a Discovery Procedure (discovery procedure).
  • the communication processing system according to any one of appendices 1 to 10, wherein the communication terminal includes an IoT device, an MTC device, and an M2M device.
  • a communication processing method of a communication processing system comprising a communication terminal, a base station, and a relay station that relays communication between the communication terminal and the base station, In the communication terminal, a measurement step of measuring the received signal strength from the relay station; Re-selecting the relay station if the measured received signal strength is less than a first threshold and comparing the measured received signal strength with a second threshold greater than the first threshold A control step for controlling to reduce the number of times the received signal strength is measured in the measuring step when the received signal strength is greater than the second threshold;
  • a communication processing method including: (Appendix 13) Measuring means for measuring the received signal strength from the relay station that relays communication between the communication terminal and the base station; Re-selecting the relay station if the measured received signal strength is less than a first threshold and comparing the measured received signal strength with a second threshold greater than the first threshold Control means for controlling to reduce the number of times of measurement of the received signal strength by the measuring means when the received signal strength is greater than the second threshold;
  • the communication terminal according to appendix 13, wherein a decrease in the number of times the received signal strength is measured by the measuring unit is stopped.
  • Appendix 15 A measurement step of measuring the received signal strength from a relay station that relays communication between the communication terminal and the base station; Re-selecting the relay station if the measured received signal strength is less than a first threshold and comparing the measured received signal strength with a second threshold greater than the first threshold A control step for controlling to reduce the number of times the received signal strength is measured in the measuring step when the received signal strength is greater than the second threshold;
  • a communication terminal control method including: (Appendix 16) A measurement step of measuring the received signal strength from a relay station that relays communication between the communication terminal and the base station; Re-selecting the relay station if the measured received signal strength is less than a first threshold and comparing the measured received signal strength with a second threshold greater than the first threshold A control step for controlling to reduce the number of times the received signal strength is measured in the measuring step when the received signal strength is greater than the second threshold
  • a timing setting means for setting a timing at which a communication terminal measures received signal strength from a relay station that relays communication between the communication terminal and a communication processing device to the communication terminal and the relay station;
  • a first threshold for determining whether or not to reselect the relay station as compared with a received signal strength measured by the communication terminal, and a second threshold greater than the first threshold, the communication terminal
  • Threshold setting means for setting the second threshold for controlling to reduce the number of times of measurement of the received signal strength when the measured received signal strength is greater than the second threshold
  • Updating means for updating at least the setting of the second threshold based on a history of received signal strength measured by the communication terminal;
  • a communication processing apparatus comprising: (Appendix 18)
  • the threshold value setting means is a third threshold value between the first threshold value and the second threshold value, and when the received signal strength measured by the communication terminal is smaller than the third threshold value, Further setting the third threshold for stopping the decrease in the number of measurements,
  • the communication processing apparatus according to appendix 17, where

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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention porte sur un système de traitement de communication qui réduit la consommation d'énergie, dans un équipement utilisateur (UE) distant, qui est liée à la mesure d'une intensité de signal de réception. Ce système de traitement de communication est équipé de : un terminal de communication; une station de base; une station relais qui relaie une communication entre le terminal de communication et la station de base; une unité de mesure qui mesure l'intensité de signal de réception en provenance de la station relais dans le terminal de communication; et une unité de commande qui effectue une commande de telle sorte qu'une nouvelle sélection de la station relais est effectuée dans les cas où l'intensité de signal de réception mesurée est inférieure à un premier seuil, et le nombre de fois où l'intensité de signal de réception est mesurée par l'unité de mesure est réduit dans les cas où l'intensité de signal de réception mesurée, lorsqu'elle est comparée à un second seuil qui est supérieur au premier seuil, est supérieure audit second seuil.
PCT/JP2018/000359 2017-02-03 2018-01-10 Système de traitement de communication, procédé de traitement de communication, dispositif de traitement de communication, terminal de communication, et procédés de commande et programmes de commande pour lesdits dispositif et terminal WO2018142861A1 (fr)

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JP2018566009A JP6852740B2 (ja) 2017-02-03 2018-01-10 通信処理方法、通信端末およびその制御プログラム
US16/483,297 US11006368B2 (en) 2017-02-03 2018-01-10 Communication processing system, communication processing method, communication processing apparatus, communication terminal, and control methods and control programs thereof

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JPWO2018142861A1 (ja) 2019-11-21
JP6852740B2 (ja) 2021-03-31
US20200015168A1 (en) 2020-01-09

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